Emails moved from Hotmail.com to Outlook.com using Microsoft Outlook Connector have disappeared

I posted the following question to the community last week:

I had both Hotmail.com and Outlook.com loaded on Microsoft Outlook 2010 using the Microsoft Outlook Connector.

Today, I decided to move my e-mails from Hotmail to Outlook.com - it seems to work as I started seeing these e-mails on Outlook.com. Soon I realized that the "sync" process was over but only a tiny fraction of the e-mails had been transferred. The rest of the e-mails have disappeared from Hotmail.com and are also not on Outlook.com.

 I had simply dragged the folder (Inbox, or "Personal" or "Family") from Hotmail to Outlook.com.

 I really want to retrieve my e-mails - accumulated over many years.

 I never deleted any of the e-mails and am at a loss. The "Recover Deleted Items" button in the Outlook bar is greyed out.

Later, I did receive a Synchronization Report and the many errors that led to the aborted transfer - it self deleted in a few minutes :-(.

Please help!

Thank you.

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This issue was escalated and resulted in a standard and irrelevant "your account may have been hacked..." "your account was not used in the last 365 days...". No one actually seemed to have looked at the problem.

This is not right - a few Gigabytes of e-mail disappearing with a simple folder drag should be traceable. I did not delete any files whatsoever. A partial transfer indicates that something may have gone wrong at the server level. I want Outlook Support to track these e-mails.